Paradise, AZ: frost dates by year

Last spring and first fall frost at NOAA station USC00026242, 2008 to 2025, measured from daily minimum temperatures.

Elevation 5,460 ft, 31.935, -109.219. Download the data (JSON), NOAA daily records

Summary at 32°F

	Last spring frost	First fall frost
Median	Apr 27	Oct 27
Earliest	Apr 15 (2020)	Oct 8 (2011)
Latest	May 21 (2019)	Nov 13 (2016)
Trend	10.8 days earlier per decade	5.2 days later per decade
Years with data	15	18

At 28°F (hard freeze) the median last spring date is Apr 16 and the median first fall date is Nov 4.

The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.

Chart

Last spring frost (32°F)

First fall frost (32°F)

Dots are single years. The gray line is the median, the green line the fitted trend.

Year by year

Year	Last spring 32°F	First fall 32°F	Last spring 28°F	First fall 28°F
2025	Apr 21	Nov 10	Apr 21	Nov 21
2024	Apr 16	Oct 31	Apr 7	Nov 5
2023	Apr 20	Oct 30	Apr 6	Oct 31
2022	no data	Oct 25	no data	Oct 25
2021	Apr 21	Oct 14	Mar 27	Nov 18
2020	Apr 15	Oct 27	Mar 28	Oct 27
2019	May 21	Oct 25	Mar 31	Oct 25
2018	no data	Oct 16	no data	Nov 10
2017	May 17	Oct 28	Mar 7	Nov 19
2016	May 2	Nov 13	Apr 3	Nov 18
2015	Apr 18	Oct 31	Apr 17	Nov 6
2014	May 14	Nov 4	Apr 30	Nov 17
2013	May 3	Oct 17	Apr 19	Oct 31
2012	Apr 17	Oct 27	Apr 16	Oct 27
2011	May 18	Oct 8	May 2	Nov 3
2010	May 13	Nov 5	May 1	Nov 10
2009	Apr 27	Oct 26	Apr 18	Oct 29
2008	no data	Oct 13	no data	Oct 14

"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.